1- railways , e- transportation
2- cultivation of oranges , j- citrus farming
3- troposphere , g- atmosphere
4- cotton growing , i- industrial crops
5- under population , h- population
6- panama canal , c- sea routes
7- growth of New York , b- urbanisation
8- uranium , a- ores
9- coal production , d- mining
10- rainfall , f- climate
EFS Class
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